Clam AntiVirus fails to properly handle crafted Portable Executable (PE) files

Overview

A vulnerability in the way Clam AntiVirus processes Portable Executable (PE) files may lead to execution of arbitrary code.

Description

Clam AntiVirus is a GPL virus scanner that has built-in support for for a number of file types including PE. According to iDefense Public Advisory: 10.15.06:

While processing certain PE elements, two variables can be very large and integer overflow could occur. This would result in less memory being allocated than was expected by the programmer and subsequent code would overflow the heap buffer.

Note that an attacker must send a specially crafted PE file through any email gateway or personal anti-virus client that employs the Clam AntiVirus scanning engine in order to exploit this vulnerability.

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Impact

A remote, unauthenticated attacker may be able to execute arbitrary code or cause a denial of service condition.

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Solution

Update
Clam AntiVirus has released an updated version to address this issue. Refer to File Release Notes and Changelog for Clam AntiVirus 0.88.5.

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Vendor Information

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Clam AntiVirus __ Affected

Updated: October 27, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to File Release Notes and Changelog for Clam AntiVirus 0.88.5.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23180864 Feedback>).

Debian GNU/Linux __ Affected

Updated: October 27, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to Debian Security Advisory DSA-1196-1.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23180864 Feedback>).

Gentoo Linux __ Affected

Updated: October 27, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to Gentoo Linux Security Advisory 200610-10.xml.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23180864 Feedback>).

Mandriva, Inc. __ Affected

Updated: October 27, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to Mandriva Linux Security Advisory MDKSA-2006:184.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23180864 Feedback>).

SUSE Linux __ Affected

Updated: October 27, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to http://www.novell.com/linux/security/advisories/2006_60_clamav.html.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23180864 Feedback>).

Trustix Secure Linux __ Affected

Updated: October 27, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to Trustix Secure Linux Security Advisory #2006-0057.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23180864 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=422&gt;
• <http://kolab.org/security/kolab-vendor-notice-13.txt&gt;
• <http://www.securityfocus.com/bid/20535&gt;
• <http://www.frsirt.com/english/advisories/2006/4034&gt;
• <http://www.frsirt.com/english/advisories/2006/4136&gt;
• <http://securitytracker.com/id?1017068&gt;
• <http://secunia.com/advisories/22370&gt;
• <http://secunia.com/advisories/22421&gt;
• <http://secunia.com/advisories/22498&gt;
• <http://secunia.com/advisories/22488&gt;
• <http://secunia.com/advisories/22537&gt;
• <http://xforce.iss.net/xforce/xfdb/29607&gt;

Acknowledgements

This issue was reported in File Release Notes and Changelog for Clam AntiVirus 0.88.5.

This document was written by Chris Taschner.

Other Information

CVE IDs:	CVE-2006-4182
Severity Metric:	10.40 Date Public: